/**
* 計算本週週一和週日日期
*
* @return MAP
*
* @author jiangfengcheng
*/
private static HashMap<String, String> getWeekByDate() {
HashMap<String, String> dayMap = new HashMap<String, String>();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); // 設置時間格式
Calendar cal = Calendar.getInstance();
cal.setTime(new Date());
// 判斷要計算的日期是否是週日,如果是則減一天計算週六的,否則會出問題,計算到下一週去了
int dayWeek = cal.get(Calendar.DAY_OF_WEEK);// 獲得當前日期是一個星期的第幾天
if (1 == dayWeek) {
cal.add(Calendar.DAY_OF_MONTH, -1);
}
System.out.println("要計算日期爲:" + sdf.format(cal.getTime())); // 輸出要計算日期
cal.setFirstDayOfWeek(Calendar.MONDAY);// 設置一個星期的第一天,按中國的習慣一個星期的第一天是星期一
int day = cal.get(Calendar.DAY_OF_WEEK);// 獲得當前日期是一個星期的第幾天
cal.add(Calendar.DATE, cal.getFirstDayOfWeek() - day);// 根據日曆的規則,給當前日期減去星期幾與一個星期第一天的差值
String imptimeBegin = sdf.format(cal.getTime());
System.out.println("所在周星期一的日期:" + imptimeBegin);
dayMap.put("Monday", imptimeBegin);
cal.add(Calendar.DATE, 6);
String imptimeEnd = sdf.format(cal.getTime());
System.out.println("所在周星期日的日期:" + imptimeEnd);
dayMap.put("SunDay", imptimeEnd);
return dayMap;
}
根據當前日期獲得上週的日期區間(上週週一和週日日期)
/**
* 根據當前日期獲得上週的日期區間(上週週一和週日日期)
*
* @return
*
* @author jiangfengcheng
*/
public static HashMap<String, String> getLastTimeInterval() {
HashMap<String, String> dayMap = new HashMap<String, String>();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); // 設置時間格式
Calendar calendar1 = Calendar.getInstance();
Calendar calendar2 = Calendar.getInstance();
int dayOfWeek = calendar1.get(Calendar.DAY_OF_WEEK) - 1;
int offset1 = 1 - dayOfWeek;
int offset2 = 7 - dayOfWeek;
calendar1.add(Calendar.DATE, offset1 - 7);
calendar2.add(Calendar.DATE, offset2 - 7);
// 上週星期一
String lastBeginDate = sdf.format(calendar1.getTime());
System.out.println(lastBeginDate);
dayMap.put("Monday", lastBeginDate);
// 上週星期日
String lastEndDate = sdf.format(calendar2.getTime());
System.out.println(lastEndDate);
dayMap.put("SunDay", lastEndDate);
return dayMap;
}